export declare function generateSessionKey(): Uint8Array;
export declare function encrypt(data: unknown, key: Uint8Array): Promise<{
    n: string;
    c: string;
    z?: boolean;
}>;
export declare function decrypt(encrypted: {
    n: string;
    c: string;
    z?: boolean;
}, key: Uint8Array): Promise<unknown | null>;
export declare function isEncrypted(msg: unknown): msg is {
    n: string;
    c: string;
    z?: boolean;
};
export declare function encodeKey(key: Uint8Array): string;
export declare function decodeKey(encodedKey: string): Uint8Array;
export declare function parseMessage(data: string, sessionKey: Uint8Array | null): Promise<Record<string, unknown> | null>;
export declare function encryptAndSend(ws: {
    send: (data: string) => void;
    readyState: number;
}, msg: unknown, sessionKey: Uint8Array | null): Promise<void>;